After what I saw happening in Canada now I keep a bunch of cash stashed away. Still I pay for everything via card/e-payment, a bad habit I would say as that makes removing cash easier for the state - most will not even notice it too much.
What happened in Canada? Their banknotes froze due to the extreme cold?
fighting an illegal thing with another illegal thing is not the way to proceed
if a convoy blocks the way, go disperse the convoy,
they did the illegal account freezing to avoid "looking bad".
Ergo you can still make a living.
And if cash is a valid form a payment you can pay your mortgage with it.
See how simple it all is?